Motility
Estimate the percentage of sperm in field that are progressively motile (moving from one point to another as compared to just undulating).
Examine several fields and establish an average.
Record your estimate to the nearest 5 or 10 percentage units.
Note: In some instances, undulating motility may be an indication that the sample droplet of semen is too small and the sperm are being held in place by the slide and cover slip.